Printing issues

I'm experiencing various printing issues. The issues seem to change and I'm not sure why half the time.

This is the part that I'm trying to print. I've attached a photo of it as well. BedLevellingPart.jpg
In this instance there seems to be a shrinking issue on the lower layers. Curling on the top of flat part, which has never occurred before this print. And the strange things is that the round tower is generally great. Although there is some wavy output on some of the upper part, which is not all the way around, only about a centimetre of the diameter.

Looks like a slight over extrusion, you could try to lower the flowrate to 90% or 95%. What's your nozzle diameter? If it is 0.3mm or 0.4mm the 0.1mm layer heigth may be too small to give good print results. And I think on this part you should try 0.25mm or 0.3mm layer heigth, this won't affect the print quality. I can't see it clearly in the picture, they're small, and the POV doesn't show. The flat part at the bottom, is there a big overhang? Then you'll probably need support material. Can you send the STL?

Edit: I'm not using any bed or part cooling fan during printing ABS on my Mendel90.